<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>TZ-追梦</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }
        div{
            width: 200px;
            height: 100px;
            margin: 100px auto;
            border-width: 2px 2px 100px 2px;
            border-style: solid;
            border-radius: 50%;
            position: relative;
            animation: play 2s linear infinite;
        }
        div::before{
            position: absolute;
            width: 20px;
            height: 20px;
            top: 50%;
            border-radius: 50%;
            background: white;
            border: 40px solid black;
            content: '';
        }
        div::after{
            position: absolute;
            width: 20px;
            height: 20px;
            top: 50%;
            left: 50%;
            background: black;
            border: 40px solid white;
            content: '';
            border-radius: 50%;
        }
        @keyframes play {
            from{
                transform: rotate(0deg);
            }
            to{
                transform: rotate(360deg);
            }
        }
    </style>
</head>
<body>
    <div></div>
</body>
</html>